Dick, a couple of thoughts. I was thinking the same as you, cut a wedge and weld it back together. But then I read that your pan is plastic. This still can be done depending on the type of plastic. If it is a thermoplastic, one you can reshape with heat, that may be an option. How much clearance do you have from the pan to fuel lines/linkages? You could remove the foam seal, install the filters to keep everything in place, make a "U" shaped wood form to press evenly around the pan, then heat the pan (with a heat gun) in the front lower portion. It doesn't look like you have much clearance between the pan and the top of the front carb, so that may not even be an option. It could turn out to be unpleasant to look at too! If it were me, I'd make a cut the height of the back corner wall just below the radius. Take that cut forward around the front to the opposite back corner. Lower the pan to the level you want overlapping the sections and use a plastic adhesive to glue together. If you can plastic weld, that's an option too. It will probably take some heat to get the two to align well. You know, it's always something! Makes it all that much more enjoyable once you get to use it. Good luck, Terry